Improvement in stamping-mills or crushers



tttitth %tl5 (55mm @ffm-9 (nrEOItGrE- F. CASE, OF WINDSOR, VERMONT, -ASSIGNOR TO HIMSELF AND MILAN C. EULLOOK, 0F SAME PLAGE.

Letters Patent No. 110,010, dated December 13, 1870. l

s-IMPROVEMENT IN STAMPING-MILLS OR CRUS'HERS.

The Schedule referred to in these Letters Patent and making part of the same.

T all whom. it may concern n Be it;knownfthat I, GEORGE F. OASE, of Wind- `sor, in the county of XVindsor and State of Vermont,

l to the stamper.

Iimpart the motion from a revolving shaft, turned by a steam-engine, or by any suitable power, and communicate a reciprocating motion, up and down, to the stamper, through peculiarly-arranged devices adapted to spring or yield.

Iam able, by this mechanism, to .operate rapidly andgsafely on all varieties of material, and on mixtures of the hardest with softer material.

At proper velocities, my machine strikes a harder blow upon the material with'a given weight of stamp than in the ordinary process.

I will proceed to describe what I consider the best means of carrying out my invention. l

The accompanying drawing forms a part of this specification.

Figure 1 is a face view of the machine, and

Figure 2 is a side view thereof.

The remaining gures represent modifications of some of the details.

Similar letters ot' reference indicate corresponding parts in both the figures where letters are em` ployed.

n A is a rigid frame-work of wood or other suitable material.

B is 'a shaft, giving motion, 'by meansof a hand, not represented, and suitable pulleys or band-Wheels, to a shaft, C, carrying 'a crank, C', and crank-pin, c, to which latter are connected two strong pending arms, -D1 D2, having seats d1 d2, to receive a strong spiral spring, E, which tends to urge the arms D1 D2 apart. A

Itwill be understood that the arms or pendants D1 D are separate pieces, and have their bearings independent on the crank-pin c, so that they can swing to any required extent, to increase or diminish the distances apart of their lower extremities.

`My shaft IS, and, consequently, my stamper M, may Y be driven with various degrees kof velocity.

The spring E tendingto separate the arms Dl D2, that force tends to hold the links vGr G2 nearly or quite horizontal; but, when, in consequence of striking an nnyielding mass of rock, or in consequence of inertia or other cause, thc stanlper is very powerfully impelled into a higher or lower position than this would require, the spring E yields by compression, and the links G Gz assume, temporarily, an oblique position, the central point or pin n either descending below, so as to incline the links G1 Gzinto the form of the letter V, or rising above, s'o as to ineline the same links into the form ofthe sides of the letter A.

When the stamp, by the velocity of its upward motion, contracts the arms together, it compresses the spring between them, and the power thus acenmulated` is given out again in the descent of the stamp, giving an additional force to the blow, overwhat would be given if the connections were rigidly attached between thevcrank and stamp.

XVithin certain'lirnits, ,the more rapid the stamp is driven in its reciprocating motion, the harder the blow given at each revolution of the crank.

There are many modifications in which some of the features of my machine may be constructed. I donot confine myself to the precise form and proportion of the parts here represented, though I Abelieve these to be the best for general purposes.

The additional gures show some of the more obvious modifications which may be made by any good i mechanic.

facts.

In this ease the spring itself may be said to form alents, substantially :is and for the purposes herein the arms D1 D2, which approach and diverge to 2teset forth.

commodate the inclinations of the links Gl G2. In testimony whereof, I have hereunto set my I claim as my inventionname iu presence of two subscribing witnesses. The within-described stamping or crushing-ma- Wtnesses: GEORGE F. CASE. chine, having the stamper M, operated from a crank, J. B. FARNSWORTH,

C', through elastic eonneetions G1 G2, or their equiv- R. M. HALL. 

